Modulation of terahertz emission in time-domain waveform via a photoinduced phase transition in a charge ordered organic ferroelectric
作者： Hirotake Itoh , Rina Fujiwara , Yohei Kawakami , Kaoru Yamamoto , Yuto Nakamura
DOI: 10.1063/1.4995798
关键词:
摘要: The time-domain waveform of the terahertz (THz) electric field emitted from charge-ordered organic ferroelectrics α − (ET)2I3 [ET:bis(ethylenedithio)-tetrathiafulvalene)] can be significantly modulated depending on incident fluence femtosecond pulses. Weak irradiation triggers emission, showing ∼1 THz oscillation in with more than 5 cycles and a corresponding narrow spectral shape. In contrast, strong almost completely suppresses trailing portion after first cycle, resulting over 3 times broader bandwidth. As revealed by time-resolved experiments, this modulation arises cooperative nature photoinduced melting charge order accompanying quenching infrared-activity intermolecular vibrations which strongly couple emission.
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R.G.Della Valle, A Brillante, G Visentini, A Girlando, Structure and phonons of α-(ET)2+I3− crystals Physica B-condensed Matter. ,vol. 265, pp. 195- 198 ,(1999) , 10.1016/S0921-4526(98)01372-6
Kaoru Yamamoto, Aneta Aniela Kowalska, Kyuya Yakushi, Direct observation of ferroelectric domains created by Wigner crystallization of electrons in α-[bis(ethylenedithio)tetrathiafulvalene]2I3 Applied Physics Letters. ,vol. 96, pp. 122901- ,(2010) , 10.1063/1.3327810
H. Nakaya, K. Itoh, Y. Takahashi, H. Itoh, S. Iwai, S. Saito, K. Yamamoto, K. Yakushi, Terahertz responses of the high-temperature metallic phase and photoinduced metallic state in the ferroelectric charge-ordered organic salt α-(ET) 2 I 3 Physical Review B. ,vol. 81, pp. 155111- ,(2010) , 10.1103/PHYSREVB.81.155111
T. Ludwig, D. Schweitzer, H.J. Keller, Electron phonon interaction in the organic superconductors αt-(BEDT-TTF)2I3 and β-(BEDT-TTF)2IAuI Solid State Communications. ,vol. 96, pp. 961- 965 ,(1995) , 10.1016/0038-1098(95)00575-7
T. Ivek, B. Korin-Hamzić, O. Milat, S. Tomić, C. Clauss, N. Drichko, D. Schweitzer, M. Dressel, Electrodynamic response of the charge ordering phase: Dielectric and optical studies ofα-(BEDT-TTF)2I3 Physical Review B. ,vol. 83, pp. 165128- ,(2011) , 10.1103/PHYSREVB.83.165128
Masayoshi Tonouchi, Cutting-edge terahertz technology Nature Photonics. ,vol. 1, pp. 97- 105 ,(2007) , 10.1038/NPHOTON.2007.3
Y.-S. Lee, N. Amer, W. C. Hurlbut, Terahertz pulse shaping via optical rectification in poled lithium niobate Applied Physics Letters. ,vol. 82, pp. 170- 172 ,(2003) , 10.1063/1.1535268
V. Železny, J. Petzelt, R. Swietlik, B.P. Gorshunov, A.A. Volkov, G.V. Kozlov, D. Schweitzer, H.J. Keller, Far infrared response of α- and αt-(BEDT-TTF)2I3 Journal De Physique. ,vol. 51, pp. 869- 881 ,(1990) , 10.1051/JPHYS:01990005109086900
S. A. Ku, C. M. Tu, W.-C. Chu, C. W. Luo, K. H. Wu, A. Yabushita, C. C. Chi, T. Kobayashi, Saturation of the free carrier absorption in ZnTe crystals. Optics Express. ,vol. 21, pp. 13930- 13937 ,(2013) , 10.1364/OE.21.013930
Tobias Kampfrath, Koichiro Tanaka, Keith A. Nelson, Resonant and nonresonant control over matter and light by intense terahertz transients Nature Photonics. ,vol. 7, pp. 680- 690 ,(2013) , 10.1038/NPHOTON.2013.184